Bose SoundLink Flex Portable Bluetooth Speaker (2nd Gen) Sandstone — IP67 Waterproof, Hi‑Fi Sound, Up to 12H Battery

Compact, rugged and surprisingly powerful, the Bose SoundLink Flex (2nd Gen) is a portable Bluetooth speaker that delivers balanced Hi‑Fi sound, deep bass, and up to 12 hours of battery life in an IP67 waterproof, dustproof shell.

Whether you’re hiking, hanging by the pool, or moving from room to room, this second‑generation SoundLink Flex packs Bose audio technology into a hand‑sized package. It features PositionIQ orientation sensing, Bluetooth 5.3 connectivity, a built‑in nylon utility loop for clipping or carrying, and a silicone-wrapped body engineered to resist drops, dust, rust, and immersion. Use the Bose Music app to customize EQ, set shortcuts, monitor battery life, and pair multiple Bose speakers for stereo or party configurations.

How good is the sound for a speaker this size?

Despite its small footprint, the SoundLink Flex delivers clear, balanced highs, defined mids, and surprisingly deep bass for its class. Bose has tuned the drivers and passive radiators to maximize output and maintain fidelity at a range of listening volumes.

• High‑fidelity audio with clear treble and vocal presence
• Enhanced low end via passive radiators for fuller bass
• PositionIQ adjusts tuning depending on speaker orientation
• Pair two compatible Bose speakers for stereo imaging

Will it survive outdoor use and wet environments?

The SoundLink Flex is engineered to handle the elements with an IP67 rating, meaning it is both waterproof and dustproof. Its silicone-wrapped exterior and reinforced design resist shocks, rust, and accidental drops so it’s suitable for beaches, backcountry trails, and poolside relaxation.

• IP67 protection against water immersion and dust ingress
• Durable silicone body absorbs impacts and resists abrasion
• Built‑in utility loop for secure attachment to packs or hooks
• Floatable construction lets it stay buoyant during a quick dip

How long does the battery last and how do I connect my devices?

Battery life runs up to 12 hours at typical listening levels, with shorter runtime at maximum volume. Connectivity uses Bluetooth 5.3 for stable wireless playback and multipoint pairing so two devices can be connected at once.

• Up to 12 hours play time at typical listening levels
• Approximately up to 3 hours at maximum volume
• Bluetooth 5.3 for reliable range and lower latency
• Multipoint pairing and seamless reconnection via Bose app

How do I control sound and customize settings?

The Bose Music app gives you access to EQ adjustments, battery status, Bluetooth management, and customizable shortcut buttons for one‑touch actions. Physical controls on the speaker let you play, pause, skip tracks, control volume, and answer calls without opening the app.

• Adjust bass and treble through the Bose Music app
• Assign shortcut functions for voice assistant or track control
• On‑device microphone for hands‑free calls and voice features
• Firmware updates delivered via the app to keep features current

Who is this for? The Bose SoundLink Flex (2nd Gen) is aimed at outdoorsy listeners, commuters, and anyone who wants full, clean sound from a truly portable speaker that won’t mind rough handling. It’s an excellent pick for travelers who want reliable battery life, swimmers or beachgoers who need waterproofing, and music lovers who value Bose’s sound tuning in a compact, easy‑to‑carry package.